Harry marks Charles' birthday with unseen photo of Archie's christening

Prince Harry and Meghan Markle have shared a previously unseen photograph of baby Archie to celebrate Prince Charles’ birthday.

The sweet snapshot, captured by Chris Allerton and shared to the Sussex Royal Instagram page, features Prince Harry holding baby Archie with Prince Charles looking on, and appears to have been taken at Archie’s christening earlier this year.

“Happy birthday to His Royal Highness The Prince of Wales - Sir, Pa, Grandpa!” the accompanying caption reads.

The image, of Archie in his Baptism robes, will no doubt delight royal fans as previously the Duke and Duchess of Sussex have only released a few family photos from their son’s special day.

The occasion took place in a private chapel at Windsor Castle in July this year.

The picture share comes as it has been revealed the Duke and Duchess of Sussex are not expected to join the Queen for Christmas this year.

Every year, the royal family gathers at Sandringham, the Queen’s Norfolk estate, for the festive period.

The Palace confirms Harry and Meghan are joining her mother Doria Ragland in the US to celebrate Archie's first Christmas there.

The couple, who are set to begin a six-week break from royal duties next week, have plans to travel to the US for Thanksgiving, and will extended their trip to include the festive period.

The picture has been released in celebration of Prince Charles, who is celebrating his 71st Birthday today.

Got a story tip or just want to get in touch? Email us at lifestyle.tips@verizonmedia.com.

Want more lifestyle and celebrity news? Follow Yahoo Lifestyle on Facebook, Twitter and Instagram.

Or sign up to our daily newsletter here.